Article · Wikipedia archive · Last revised Jul 18, 2026

4-AcO-EiPT

4-AcO-EiPT, also known as 4-acetoxy-N-ethyl-N-isopropyltryptamine or as ethipracetin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to 4-AcO-DMT (psilacetin). It is the acetate ester of 4-HO-EiPT (ethiprocin) and a skeletal isomer of 4-AcO-EPT. The drug is taken orally. It is said to be similar in effects to 5-MeO-DiPT, producing psychedelic and mild stimulant effects. The pharmacology and toxicity of 4-AcO-EiPT have not been studied, but it is assumed that it acts on serotonin receptors. 4-AcO-EiPT was first discussed online in 2011. It was encountered as a novel designer drug being sold by online vendors in early 2022.

Last revised
Jul 18, 2026
Read time
≈ 1 min
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Citations
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Source
Wikipedia ↗
4-AcO-EiPT
Clinical data
Other names4-AcO-EIPT; 4-Acetoxy-N-ethyl-N-isopropyltryptamine; Ethipracetin; Eipracetin
Drug classSerotonergic psychedelic; Hallucinogen
ATC code
  • None
Identifiers
  • [3-[2-[ethyl(propan-2-yl)amino]ethyl]-1H-indol-4-yl] acetate
PubChem CID
ChemSpider
UNII
Chemical and physical data
FormulaC17H24N2O2
Molar mass288.391 g·mol−1
3D model (JSmol)
  • CCN(CCC1=CNC2=C1C(=CC=C2)OC(=O)C)C(C)C
  • InChI=1S/C17H24N2O2/c1-5-19(12(2)3)10-9-14-11-18-15-7-6-8-16(17(14)15)21-13(4)20/h6-8,11-12,18H,5,9-10H2,1-4H3
  • Key:VYHGUTGSNXCMKF-UHFFFAOYSA-N

4-AcO-EiPT, also known as 4-acetoxy-N-ethyl-N-isopropyltryptamine or as ethipracetin, is a psychedelic drug of the tryptamine and 4-hydroxytryptamine families related to 4-AcO-DMT (psilacetin).12 It is the acetate ester of 4-HO-EiPT (ethiprocin) and a skeletal isomer of 4-AcO-EPT.12 The drug is taken orally.2 It is said to be similar in effects to 5-MeO-DiPT, producing psychedelic and mild stimulant effects.2 The pharmacology and toxicity of 4-AcO-EiPT have not been studied, but it is assumed that it acts on serotonin receptors.2 4-AcO-EiPT was first discussed online in 2011.2 It was encountered as a novel designer drug being sold by online vendors in early 2022.2

See also

See also

References

References

  1. Catalani V, Corkery JM, Guirguis A, Napoletano F, Arillotta D, Zangani C, et al. (August 2021). "Psychonauts' psychedelics: A systematic, multilingual, web-crawling exercise". Eur Neuropsychopharmacol. 49: 69–92. doi:10.1016/j.euroneuro.2021.03.006. PMID 33857740.
  2. "4-AcO-EIPT (Ethipracetin)". AIPSIN (in Russian). Retrieved 2 January 2026.
External links